Option for agent to not change file on disk before approval

[akriegman]

Right now when the agent edits a file, it changes the file on disk and I can then revert it by rejecting the changes. I would prefer if it were the other way around, or if there were an option to choose. For one thing, this means that if the model makes destructive changes then I have to revert them through zed, and I have to trust zed to not mess this up. But I also just prefer the workflow of adding one change at a time and seeing what it does, instead of removing one at a time.

[rohan-patra]

I think this was the previous behavior and a recentish update changed it to materialize changes on the disk before accepting them.